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//---------------------------------------------------------------------
// <copyright file="EntityModelBuildProvider.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//
// @owner [....]
// @backupOwner [....]
//---------------------------------------------------------------------
using System;
using System.Collections.Generic;
using System.Text;
using System.Diagnostics;
using System.CodeDom;
using System.CodeDom.Compiler;
using System.Globalization;
using System.IO;
using System.Web;
using System.Web.Hosting;
using System.Web.Compilation;
using System.Xml;
using System.Data.Entity.Design;
using System.Data.Metadata.Edm;
namespace System.Data.Entity.Design.AspNet
{
/// <summary>
/// The ASP .NET Build provider for the CSDL in ADO .NET
/// </summary>
///
[BuildProviderAppliesTo(BuildProviderAppliesTo.Code)]
public class EntityModelBuildProvider : System.Web.Compilation.BuildProvider
{
/// <summary>
/// Default constructor
/// </summary>
public EntityModelBuildProvider()
{
}
/// <summary>
/// We want ASP .NET to always reset the app domain when we have to rebuild
/// </summary>
/// <param name="results"></param>
/// <returns></returns>
public override BuildProviderResultFlags GetResultFlags(CompilerResults results)
{
return BuildProviderResultFlags.ShutdownAppDomainOnChange;
}
/// <summary>
///
/// </summary>
/// <param name="assemblyBuilder"></param>
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Globalization", "CA1308:NormalizeStringsToUppercase")]
public override void GenerateCode(AssemblyBuilder assemblyBuilder)
{
// look at the assembly builder to see which language we should use in the App_Code directory
EntityCodeGenerator generator = null;
if (assemblyBuilder.CodeDomProvider.FileExtension.ToLowerInvariant() == "cs")
{
generator = new EntityCodeGenerator(LanguageOption.GenerateCSharpCode);
}
else
{
generator = new EntityCodeGenerator(LanguageOption.GenerateVBCode);
}
// generate the code for our CSDL file
IList<EdmSchemaError> errors = null;
using (XmlReader input = XmlReader.Create(VirtualPathProvider.OpenFile(base.VirtualPath)))
{
using (StringWriter output = new StringWriter(CultureInfo.InvariantCulture))
{
// Read from input and generate into output, put errors in a class member
var entityFrameworkVersion = GetEntityFrameworkVersion(BuildManager.TargetFramework.Version);
errors = generator.GenerateCode(input, output, entityFrameworkVersion);
if (errors.Count == 0)
{
output.Flush();
assemblyBuilder.AddCodeCompileUnit(this, new CodeSnippetCompileUnit(output.ToString()));
}
}
}
// if there are errors, package this data into XmlExceptions and throw this
// if we are in VS, the ASP .NET stack will place this information in the error pane
// if we are in the ASP .NET runtime, it will use this information to build the error page
if (errors != null && errors.Count > 0)
{
XmlException inner = null;
XmlException outer = null;
foreach (EdmSchemaError error in errors)
{
outer = new XmlException(error.Message, inner, error.Line, error.Column);
inner = outer;
}
throw outer;
}
BuildProviderUtils.AddArtifactReference(assemblyBuilder, this, base.VirtualPath);
}
private static Version GetEntityFrameworkVersion(Version targetFrameworkVersion)
{
Debug.Assert(targetFrameworkVersion != null, "targetFrameworkVersion should not be null.");
Debug.Assert(targetFrameworkVersion >= new Version(3, 5), "This assembly doesn't exist pre-3.5.");
if (targetFrameworkVersion < new Version(4, 0))
{
return EntityFrameworkVersions.Version1;
}
if (targetFrameworkVersion < new Version(4, 5))
{
return EntityFrameworkVersions.Version2;
}
return EntityFrameworkVersions.Version3;
}
}
}
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